You can request actions for other (Free assets or below $20) Assets and Api's even they are not on the asset store. (Like "Input Simulator" and "Midi Bridge")When there are enough requests for a asset i will look into creating them.You can also 'Sponsor' to add an asset to the list. (mail me for more details)

I will also release another asset soon for asset above $20, which will be more expensive than this one, as i will need to purchase those assets to make actions for it.For now no plans to release a separate asset for $20 or above.